Machine for producing spring dress-fasteners



K. G. BLOMBERG AND B. A. PETTERSSON. MACHINE FOR PRODUCING SPRING DRESS FASTENERS.

APPLICATION FILED OCT. 17, 1919.

- Patented Nov. 1, 1921,

3 SHEETS-*SHEET 1.

My Q Q K. G. BLOMBERG AND 'B. A. PETTERSSON. I MACHINE FOR PRODUCING SPRING Dmzss FASTENERS.

APPLICATION FILED OCT. 17, I919- 1,395,900, Patented Nov. 1, 1921.,

3 SHEETS-SHEET 3.

K. G. BLOMBERG AND B. A. PETTERSSON.

MACHINE FOR PRODUCING SPRING DRESS FASTENERS. APPLICATION FILED ocru n. 1919.

1,395,900. Patented Nov. 1, 1921.

3 SHEETS-SHEET 2.

. UNITED sur es KLAS ens'rAv BLOlllIBEItG, or

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mnonnvnron rnonuoiite srnrne nnnss resr nnnns Specification 01 Letters Patent.

1 Patented Nov. 1, 1923 Application filed Gctober 17, 1918. seria1'nofs31,5114] 'ful Improvements in Machines for Produc ing Spring Dress- Fasteners, of' which the following -is a specification. j

The invention described below has reference to a device used on dress fastener making machines for the purpose of shaping and inserting the spring in the top fastener and for rolling the edge of the fastener over the spring. I

The design of the device is made clear by the annexed drawing, in which Figures 1 and 2 show the device from the side and in plan. v

Fig. 3 is a vertical section along 3-3 in the Fig. 1.

Figs. 47 show the forming of the spring, and

Figs. 8-11 the introduction of the spring in the top fastener and the rolling of the edge over same at which the section is now made at right angles with the longitudinal section of the slide.

Figs.'13 show a general view of the device in which 1 and 2 are two concentrically placed tubes, the outside tube 1 serving as a core for bending the wire, and the inside tube 2 guiding the wire over the knob of the fastener. On the frame 10 are attached guides 12 between which moves the slide 11 (Figs. 17) which is actuated by a cam 16 and a spring 17, such slide 11 bein intended the line 7 for bending the wire around the tu e 1. The

pincers 4 are intended for squeezing the ends of the wires together and inserting them in the outside tube 1 which has the upper end cut away at 18 (Fig. 4:) so that only a little more than half of the material remains. The pincers 4 are afiixed to a slide which is given a reciprocating motion by the link 5, the latter being actuated by a camfi and a spring 7. Thejaws 29 ofthe pincers 4 are held apart by a; spring 8 affixed to the shanks of the pincers, whereas the jaws are pressed together by the adjustable blocks 9 on the guides 37 during the movement of the pincers toward the wire 20 that is to be bent.

' means of the screws 40 the blocks are attached to guide 37, and the blocksare adjusted in desired positions by means of the screw 41" and42.' The inside. tube 2 is beveled off on two opposite sides at the top end, giving it a pointed shape when viewed from the side" (Fig. Thearm'43 serves as guide of the tube 1 at the'lower end,e.nd in doing so the guide-strips 44 keep the tube from turning. The spiral spring 45 between the washer 4:6 and tube flange 47 serve to keep the tube 2. raised. 18 is a' threaded p1pe,fa'nd 19 a screw-foradjustmentof tube 2. The tube 1 can be movedup and dow'nin a pillow 27 which has a recess that fits around the tube and tapers downward. On top of the pillow is a washer 28 with a smaller hole than the pillow, so that the spring. 20, after being pushed off the tube 1 i (F ig. 9) by the pillow 27, is retained underneath the washer 28 until the fastener has grasped same. The knob of the fastener has parallel slots (35) on the sides in which the spring is to be placed.

The fastener is brought up to the tube by a transporter 19 which is described in detail in patent application Serial No. 331,511.

The operation of the invention is seen from the Figs. 4=l1. A wire 20 being fed in through the hole 14 and being cut by the knife 13 in required length.

The outside tube 1 is moved upward, which movement is produced by a lever 21 actuated by a cam 22, whereupon the slide 11 is carried forward (Fig. 5) toward that tube so that the wire 20 will be bent around tube 1 by the slide 11 and the recess 3 made in the end of the slide. Thev pincers 4 are simultaneously brought up from the other end of the device and the jaws 29 close over the free ends of the wire which project beyond the tube (Fig. 5). The wire is now shaped around the remaining portion of the tube 1 when the jaws close up. The jaws close because they come in contact with blocks 9 on their forward movement. The jaws are opened somewhat during the continued forward movement, when the backs 30 of the jaws have passed the blocks 9, which gives the wire an opportunity to slide between the jaws. Owing to the continued movement of the pincers the wire is then bent into the tube 1 and receives the form shown in Fig. 7.

The slide 11 and the pincers 4 are later 7 the outside tube being pulled down, which operation leaves the shaped wire in the pillow '27 underneath the washer 28, (Fig. 9)

he transporter 19 then brings up the fastener 26 which has the edge turned up at right angles with the bottom, and the fas tener will then project above the tubes 1 and 2, .(Fig. 9). The fastener is now carried downward at the same time that the inside tube 2 is carried upward by a lever 23 and a cam 24: which causes the free ends of the wire 20 to be'pried apart by the pointed upper part of the tube and the wire to be forced over the knob of the fastener (Fig' 10);

r The transporter 19 with the fastener is then carried farther down, and the edge of the fastener is rolled over the circular part of the wire spring by thetapered recess in the pillow die 27 (Fig. 11), Y

ll e claim:

1. In a device for forming and introducing the spring of dress fasteners into their holdem ina machine employed for making such fasteners a slide (11) with reciprocating movement and provided with a recess (3) for bending the wire, a tube ,(1) around which the wire is shaped and pincersll) with reciprocating movement which perform such shaping a pillow die 27) which said pillow envelope the tube (1), a washer (28) on top of said pillow, which washer is probeveled ofl' on two opposite sides', 'a rocker lever (23) for moving the said tube upward for the purpose of prying apart the free ends of the spring so that it willpass over the knob of the button. v 7

BENGT AUGUST PETTERSSON; KLAS GUSTAV BLOMBERGQ.

40 a tube (2) which said tube has the top end 

